人教版九年级英语Unit 15 We are trying to save the manatees.Section A 1课件.ppt

Unit15Weretryingtosavethemanatees!,WarmingupAnimalsaremansfriends.,Whatsthis?Andhowtodescribeit?,enormous,gray,Whatsthis?Andhowtodescribeit?,noisy,clever,Whatsthis?Andhowtodescribeit?,playful,Whatsthis?Andhowtodescribeit?,gentle,shy,Whatsthis?Andhowtodescribeit?,playful,Whatsthis?Andhowtodescribeit?,aggressive,funny,1bListening,gentlefurryenormousplayfulnoisyshyaggressivegrayfastspotted,IamlikethisanimalbecauseIamstrongandintelligent.IlikewaterandIliketoeatvegetables.,Yourelikeanelephant.,No.,YourelikeaManatee.,Yes.,2aListening,Explanation,1.IamlikethisanimalbecauseIamstrongandintelligent.belike=looklike=besimilarto像，看起来像。如：Heislikehisfather.他像他的父亲。=Helookslikehisfather.=Heissimilartohisfather.,这里的like作介词，意思为“像”，like还可做动词用，表示“喜欢”，like（doing）sth.喜欢做某事。如：Helikeshisfatherverymuch.他很喜欢他的父亲。Marylikesplayingvolleyball.玛丽喜欢打排球。,2.Howbigaremanatees?海牛有多大？howbig.询问体重。以how组合的疑问词组有很多，如：howold询问年龄howoften询问频率howlong询问动作持续的长短howmuch询问质量或者价钱howfar询问距离howmany询问数量howsoon询问过多久,3.theyweighabout1,000pounds,他们大约重1000磅。weigh称重量，测重量。如：Heweighedthestoneinhishand.他用手掂了掂这块石头的重量。Thepieceofmeatweighsfourpounds.这块肉重四磅。,weight还可用做名词，重量。如：Whatisyourweight？你的体重是多少？,4.Weretryingtosavethemanatees.我们正在竭尽全力拯救海牛。Trytodo=tryonesbesttodo努力去做某事。如：Everystudentshouldtrytostudyhardinordertostudyinauniversity.为了进入大学学习,每个学生都应该努力学习。,Grammar,do/does,did,be(am/is/are)doing,have/hasdone,was/weredone,have/hasbeendone,定义：现在完成时表示到目前为止已经完成，并对现在留下某种后果和影响的动作。1.表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语。,现在完成时,have/has+动词的过去分词,如:already,yet,ever,never,just,before,once,twice等连用,也可以和包括现在在内的时间状语,如thesedays,today,thisyear,sofar等连用。,2.表示过去发生的动作或存在的状态,一直持续到现在,也许还将继续下去,可以和表示从过去某一时刻延续到现在的一段时间的状语连用。即for+时间段,since+时间点/从句,inthelasttenyears等,谓语只可用延续性动词。,2.has/havebeento去过某地表示某人的一种经历,可与once,twice,already,ever,never等连用。have/hasgoneto去某地了,说话时某人已离开此地,在去某地的途中或已在某地。,have/hasbeenin逗留在某地(已经一段时间)。常和fortendays,sinceIcamehere等连用。,1.WhereisJim?He_Wuhan.2.Myparents_theGreatWalltwice.Theylikethereverymuch.3._youever_totheHappyvalley?4.Howlong_Peter_theWestHillfarm?,havebeento,Have,beento,has,beenin,hasgoneto,5.Mysister_theshop.Shewillbebackintwohours.6.She_Shanghai.Sheisnthere.7.She_Shanghai.Sheishere.8.She_Shanghaifortwoyears.,hasgoneto,hasgoneto,hasbeento,hasbeenin,3.already-yet已经用于肯定句,用于否定句,疑问句,1.Shehasnotseenthisfilm_.Shehas_seenthisfilm.2.Ihave_combedmyhair.Haveyoucombedyourhair_.3.Hehas_watchedavideo.Hehasnotwatchedavideo_.,already,already,already,yet,yet,yet,4.现在完成时中延续性动词和终止性动词,英语动词根据词义可分为两种,一种是延续性的,一种是终止性的,终止性动词(也可称为非延续性动词,瞬间动词,或点动词),如:become,begin,buy,borrow,arrive,die,finish,gettoknow,go,join,marry,start,stop等。表示动作的发生与结束于一瞬间完成,不能再延续,所以它的现在完成时不能和表示延续的时间状语连用,即不能与表示一段时间的状语,for+时间段,since+时间点/从句连用,也不能用在howlong引导的特殊疑问句。,初中英语课本中常见终止性动词有:leave,go,come,arrive,begin,buy,borrow,die,join,become等。终止性动词要表示持续时,可用以下方法：将时间状语改为时间段+ago,句中谓语动词用一般过去时。,eg.我弟弟参军两年了。Mybrotherjoinedthearmytwoyearsago.若保留for+时间段,since+时间点/从句,或用在howlong句型中,则需将终止性动词改为相应的状态动词或延续性动词。,come/go/arrive/get/reach/move-bein/atopen-beopendie-bedeadclose-beclosedbecome-beborrow-keepputon-wearbuy-have,常见终止性动词与延续性动词(或状态动词)的对应关系如下:,leave-beaway(from)begin/start-beonfallasleep-beasleepend/finish-beovercatchacold-haveacold,jointhearmy-beinthearmybeasoldierjointheParty-beinthePartybeaPartymember,1.吉姆买了这只钢笔两年了。Jimhashadthispenfortwoyears.Jimhashadthispensincetwoyearsago.Jimhashadthispensince2003.ItistwoyearssinceJimboughtthispen.,IthasbeentwoyearssinceJimboughtthispen.Jimboughtthispentwoyearsago.2.李雷自从2003年就参军。3.那部电影开始30分钟了。4.自从两年前这家商店就开了。5.那个老人已经死了五年了。6.莉莉六年前就离开家了。,现在完成时和一般过去时的区别：现在完成时所表明的是过去发生的动作对现在的影响,强调的是现在的情况,不可以和表示过去的时间状语yesterday,in1991,threedaysagolasttime,lastnight等连用。一般过去时表明的是过去发生的事实,和现在不发生关系。,5.现在完成时中的for与sincefor+时间段与延续性动词的现在完成时连用since+时间点/从句。Ihavekeptthelibrarybookforaweek.=Ihavekeptthelibrarybooksinceaweekago.,Itis/hasbeen+一段时间+since.自从某事发生已有一段时间了。eg.Itis/hasbeentwoyearssincemybrotherjoinedthearmy.,注意:1.since引导的从句中动词用过去时。2.when引导的特殊问句不与现在完成时连用。3.havegot,hasgot虽然是现在完成时,但havegot=havehasgot=has,1.Itsalongtimesincewe_(meet)lasttime,isntit?2.-Iknowyou_(choose)apicturebookamongthese.-Yes,Havealookatit,please.3.Sofar,spaceshipswithoutpeople_(reach)themoonandsomeotherpartsoftheuniverse.,met,havechosen,havereached,4.Myfather_homefornearlythreeweeks.A.hasgoneawayfromB.hasleftC.hasbeenawayfromD.wentaway,5.MrandMrsGreenhave_inChinaforaweek.A.beenB.gotC.arrivedD.reached,近义句转换：1.JackjoinedtheLeaguefivemonthsago.Jack_aLeaguememberfivemonthsago.2.Itsalongtimesincewemetlast.We_eachotherforalongtimesincewemetlasttime.,hasbeen,havent,seen,Fillintheblankswiththerightformsofthegivenwords.1.Everydaymymother_(get)upearly.2.Thedinosaureggs_(discover)manyyearsagobyscientists.3.Listen!Somechildren_(sing)anEnglishsongoverthere.,gets,werediscovered,aresinging,4.Inourhometownthereusedto_(be)manyoldtrees.5.Mywork_(notfinish)yet.Icantgoouttoplaywithyou.,be,hasntbeenfinished,【运用】,根据括号中所给动词,用其正确时态填空。,1.Frank_(help)hismotherwiththehouseworkonSundays.2.I_(become)amiddleschoolstudentthreeyearsago.,helps,became,3.Hello!Ma